diff --git a/spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompBrokerRelayMessageHandler.java b/spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompBrokerRelayMessageHandler.java
index b72335045c3..7cf256f6e82 100644
--- a/spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompBrokerRelayMessageHandler.java
+++ b/spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompBrokerRelayMessageHandler.java
@@ -650,21 +650,45 @@ public class StompBrokerRelayMessageHandler extends AbstractBrokerMessageHandler
}
}
+ /**
+ * Forward the given message to the STOMP broker.
+ *
+ * The method checks whether we have an active TCP connection and have
+ * received the STOMP CONNECTED frame. For client messages this should be
+ * false only if we lose the TCP connection around the same time when a
+ * client message is being forwarded, so we simply log the ignored message
+ * at trace level. For messages from within the application being sent on
+ * the "system" connection an exception is raised so that components sending
+ * the message have a chance to handle it -- by default the broker message
+ * channel is synchronous.
+ *
+ *
Note that if messages arrive concurrently around the same time a TCP
+ * connection is lost, there is a brief period of time before the connection
+ * is reset when one or more messages may sneak through and an attempt made
+ * to forward them. Rather than synchronizing to guard against that, this
+ * method simply lets them try and fail. For client sessions that may
+ * result in an additional STOMP ERROR frame(s) being sent downstream but
+ * code handling that downstream should be idempotent in such cases.
+ *
+ * @param message the message to send, never {@code null}
+ * @return a future to wait for the result
+ */
+ @SuppressWarnings("unchecked")
public ListenableFuture forward(final Message message) {
+ TcpConnection conn = this.tcpConnection;
+
if (!this.isStompConnected) {
if (this.isRemoteClientSession) {
- if (StompCommand.DISCONNECT.equals(StompHeaderAccessor.wrap(message).getCommand())) {
- return EMPTY_TASK;
+ if (logger.isTraceEnabled()) {
+ logger.trace("Ignoring client message received " + message +
+ (conn != null ? "before CONNECTED frame" : "after TCP connection closed"));
}
- // Should never happen
- throw new IllegalStateException("Unexpected client message " + message +
- (this.tcpConnection != null ?
- "before STOMP CONNECTED frame" : "after TCP connection closed"));
+ return EMPTY_TASK;
}
else {
throw new IllegalStateException("Cannot forward messages on system connection " +
- (this.tcpConnection != null ? "before STOMP CONNECTED frame" : "while inactive") +
+ (conn != null ? "before STOMP CONNECTED frame" : "while inactive") +
". Try listening for BrokerAvailabilityEvent ApplicationContext events.");
}
@@ -680,8 +704,7 @@ public class StompBrokerRelayMessageHandler extends AbstractBrokerMessageHandler
}
}
- @SuppressWarnings("unchecked")
- ListenableFuture future = this.tcpConnection.send((Message) message);
+ ListenableFuture future = conn.send((Message) message);
future.addCallback(new ListenableFutureCallback() {
@Override
@@ -693,7 +716,12 @@ public class StompBrokerRelayMessageHandler extends AbstractBrokerMessageHandler
}
@Override
public void onFailure(Throwable t) {
- handleTcpConnectionFailure("Failed to send message " + message, t);
+ if (tcpConnection == null) {
+ // already reset
+ }
+ else {
+ handleTcpConnectionFailure("Failed to send message " + message, t);
+ }
}
});
diff --git a/spring-messaging/src/main/java/org/springframework/messaging/tcp/reactor/ReactorTcpClient.java b/spring-messaging/src/main/java/org/springframework/messaging/tcp/reactor/ReactorTcpClient.java
index 2b3c86706c5..7aebd528f68 100644
--- a/spring-messaging/src/main/java/org/springframework/messaging/tcp/reactor/ReactorTcpClient.java
+++ b/spring-messaging/src/main/java/org/springframework/messaging/tcp/reactor/ReactorTcpClient.java
@@ -21,8 +21,6 @@ import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Properties;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
import org.springframework.messaging.Message;
import org.springframework.messaging.tcp.ReconnectStrategy;
import org.springframework.messaging.tcp.TcpConnectionHandler;
@@ -64,8 +62,6 @@ public class ReactorTcpClient implements TcpOperations
{
public static final Class REACTOR_TCP_CLIENT_TYPE = NettyTcpClient.class;
- private final static Log logger = LogFactory.getLog(ReactorTcpClient.class);
-
private final TcpClient, Message> tcpClient;
private final Environment environment;
@@ -186,7 +182,7 @@ public class ReactorTcpClient
implements TcpOperations
{
connection.when(Throwable.class, new Consumer() {
@Override
public void accept(Throwable t) {
- logger.error("Exception on connection " + connectionHandler, t);
+ connectionHandler.handleFailure(t);
}
});
connectionHandler.afterConnected(new ReactorTcpConnection(connection));
diff --git a/spring-websocket/src/main/java/org/springframework/web/socket/messaging/StompSubProtocolHandler.java b/spring-websocket/src/main/java/org/springframework/web/socket/messaging/StompSubProtocolHandler.java
index d6c56f8c5d1..68ad7128853 100644
--- a/spring-websocket/src/main/java/org/springframework/web/socket/messaging/StompSubProtocolHandler.java
+++ b/spring-websocket/src/main/java/org/springframework/web/socket/messaging/StompSubProtocolHandler.java
@@ -368,6 +368,10 @@ public class StompSubProtocolHandler implements SubProtocolHandler, ApplicationE
this.userSessionRegistry.unregisterSessionId(userName, session.getId());
}
+ if (logger.isDebugEnabled()) {
+ logger.debug("WebSocket session ended, sending DISCONNECT message to broker");
+ }
+
StompHeaderAccessor headers = StompHeaderAccessor.create(StompCommand.DISCONNECT);
headers.setSessionId(session.getId());
Message message = MessageBuilder.withPayload(new byte[0]).setHeaders(headers).build();